Chrissy Teigen is singing John Legend's praises for his 40th birthday. On Dec. 28, the mother of two shared a heartwarming post for her husband on Instagram, and it has us swooning hard. In addition to sharing a handful of adorable family photos, Chrissy struck the perfect note with her sweet and witty caption. "Happy 40th birthday to the most incredible man," she wrote. "The best father, hardest worker, best lover, best friend I could ever imagine. Every day I am grateful for how much you love us and how much you both say it and show it. You are one of a kind. I am grateful to your family for creating and raising such a pure, sweet, brilliant man. The world has been blessed by your 40 years on this planet. I love you. I showed you that this morning BOOYAHHHH." Could these two be any more perfect together?